Bugfix #4882

New toolsettings variable "select_thresh" was not initialized. This caused
the option "similar normals" to not work really (uses a dot product).

It now is initialized (scene.c) as well as corrected in do_versions for
saved files.

source/blender/blenkernel/intern/scene.c

@@ -224,6 +224,7 @@ Scene *add_scene(char *name)
 	sce->toolsettings->uvcalc_mapdir = 1;
 	sce->toolsettings->uvcalc_mapalign = 1;
 	sce->toolsettings->unwrapper = 1;
+	sce->toolsettings->select_thresh= 0.01f;
 	
 	sce->jumpframe = 10;
 	sce->audio.mixrate = 44100;

source/blender/blenloader/intern/readfile.c

@@ -5561,7 +5561,15 @@ static void do_versions(FileData *fd, Library *lib, Main *main)
 				}
 		}
 	}
-	
+		
+	if(main->versionfile <= 242) {
+		Scene *sce;
+		
+		for(sce= main->scene.first; sce; sce= sce->id.next) {
+			if (sce->toolsettings->select_thresh == 0.0f)
+				sce->toolsettings->select_thresh= 0.01f;
+		}
+	}
 	
 	/* WATCH IT!!!: pointers from libdata have not been converted yet here! */
 	/* WATCH IT 2!: Userdef struct init has to be in src/usiblender.c! */